Someone who sticks up for a friend or person in hopes of getting something out of it other then trying to help them.

Mostly males who trys to win over the girl they're protecting, yet making the girl seem bad.
Devaint art, white knight
by roseluna March 15, 2011
A guy that sells out his own male gender to earn some extra " brownie " points with the ladies

Or a guy that will pretty much do everything a girl tells them..
Jack: " Hey hey what the fuck man, I'm the victim here, Sally pushed me!

Bouncer Mcgregory: Thats not what I heard, Sally said you were bothering her, I'm kicking your punk ass out the club

Jack: WAIT! Are you even gonna hear me out?! Fuck I'm not going anywhere without my lawyer!

Bouncer Mcgregory: No whatever Sally says counts, we need the hot girls here to attract more male customers. ( yes I did see Sally push you and spill her drink on your shirt, but I'm have to kick you out because I want to get into her panties tonight, sorry Jack your a good man, but its everyman for himself.. )

Mary: Ian was such a creep today, he shook my hand the wrong way

Bob: Woah, yea he is such a creep, that guy is some big ass loser. Your right. ( hoping to earn some points to get with Mary )

Bob: ( muahahaha, I'm such a white knight in shining armor! I am so bedding Mary )
by Emperor of West September 04, 2012
A person with low self esteem who combats this with a unwavering need to aid others who may or may not need it. They usually have very isolated personal lives as they are very judgmental of others, surrounding themselves only with those who feed their desire to help and feel as a savior. Most commonly sighted in young men in regards to women, this is only a lesser form as it is usually only temporary, fading with life experience. More serious cases occur in correlation with chronic self esteem problems where the person needs to maintain a high view of themselves through self righteous acts of kindness. These people enjoy surrounding themselves with troubled individuals, who form a farm which is harvested for what they use as pseudo self esteem.
Don't give the white knight reason to flaunt his "good deeds".
by RedShiftXIII March 14, 2015
A person (usually a male) who sees the typical maiden in distress, and believes that he can help her. A male version of the "mother figure" that some girls become.

White knight term can also be applied to a person participating in online forum who is not tasked with moderating it, but engages in the activity nonetheless - so-called backseat modding. The underlying causes for the behaviour are the same - person is anthropomorphising the forum and sees it as a "maiden in distress" and charges to the rescue.
"Why is he going out with her? She's broken, and a little crazy."

"The fool's just being a White Knight."
by ahawtf June 28, 2012
a type of cockblocker
(noun, verb: White Knight. adjective: White Knightey.)

a male acquaintance of a woman who, usually motivated by jealousy, attempts to cockblock the woman by defending her (implicitly, her chastity) from another man.

Though the White Knight typically attempts to persuade the other man that the woman is "not interested," the White Knight usually is motivated to act in the first place only because he senses that the woman is attracted to the other man.

Amongst cockblockers, the White Knight is a relatively impotent type, because (i) the woman usually knows intuitively that the White Knight wants her and is motivated by his jealously, and (ii) White Knights almost always have low to moderate social skills/influence (which is why they are White Knights, because they do not get laid themselves), so the woman also knows that the White Knight's irritation is not likely to have negative social consequences for her. However, the White Knight's attempts are sometimes successful, often only because he unwittingly embodies the woman's fear of Slut Shaming (being judged), a very potent cockblocking force.

Typically, a man who behaves as a White Knight is in a pathetic state of mind. He feels for some reason that he cannot get laid, so reduces himself to trolling other men, especially men who happen to be hitting it off with women whom the White Knight has a history of fantasizing for.
Brian became a shining White Knight as soon as that guy from the rock band came over - he guarded Emily for more than an hour until she left.
by benjferri July 06, 2015
A white knight is a guy that defends and protects girls for no reason.

Unlike regular knights who's acts are steeped in desire, a white knight truly desires nothing more than her well being, and would rather be somebody who really loves them and really cares for them, to harrowing inconvenience, in loss and to be that real, existing inside another heart in a way that can never end pathetically, generically and foolishly.
I white knight for girls. That's what I do.
by robotlegcommando November 03, 2011
The name given to those who throw up or "whitey" after a single marijuana joint.
"Did you here Paddy pulled a whitey after one joint last night?"
"Yeh, he can't bun. He's a White Knight"
by Bunzilla January 15, 2013

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